Search Options

Sort by:

Sort search results by

Publication Type:

Publication Type filter

Open access:

Publication Date:

Periodicals:

Periodicals filter

Search results

Online since: December 2012
Authors: Yuan Chen, Cun Yan Cui, Ping Jun Si, Hua Wang
Introduction Gas-liquid separation mechanisms for on-orbit resupply and manned spacecraft have traditionally presented major problems in ground test and flight applications[1].Reduction in the magnitude of the gravity vector will have a profound effect not only on the gas-liquid flow behavior, but also on the technologies that will be required for future space-based platforms[2].
[2] Mcquilen John, Motil Brian, Reduced gravity gas and liquid flows: simple data for complex problems, R.
Online since: July 2014
Authors: Li Li, Tsutomu Saito, Dong Ping Wang
The following conventions were used for data reduction.
Online since: February 2008
Authors: Wei Pan, Ruo Bing Han, Chun Lei Wan, Hui Wu
To data, various technologies have been developed to prepare nano-structured materials, amongst them, template method is one of the most controllable and efficient ways widely used.
While the template film is annealed at 400 o C, spheric pores in the nickel film after template removal separate again besides some of holes' aggregations as shown in fig. 2(d), mainly because of the reduction of surface areas of spherical particles as partially sintered at a higher temperature.
Online since: September 2013
Authors: Aleksandr Petrov, Leonid L. Afremov
Introduction It is known, that phase transition temperature in ferromagnetic, antiferromagnetic or ferrimagnetic ultrathin films decreases with reduction of its thickness [see, for example, 1 - 4].
Table Crystalline lattice Argument λ Calculated values Simple cubic (SU (100)) 1.802 Body-centered (BCC (100)) 1.599 Body-centered (BCC (110)) 1.609 Face-centered (FCC (100)) 1.581 Face-centered (FCC (111)) 1.585 Experimental values obtained at films CoOSiO2 λexp=1.55±0.05 [1], λexp=1.60±0.1 [2] It results from the table that values of λ calculated by us, are rather close to experimental data obtained in respect of films CoOSiO2 in which CoO has a simple crystalline structure kind of NaCl with FCC lattice.
Online since: October 2011
Authors: Wei Song, Hua Zhou
In order to eliminate disturbance of initial load step, data from 0.01sec to 0.05sec is chosen to analyze.
It’s clear that large fillet leads to a reduction of speed fluctuation which is helpful to obtain a smooth rotation movement of gears.
Online since: April 2014
Authors: Alexey V. Ognev, Alexander S. Samardak, Gleb Tregubov, Evgeniy Mikoluk, Ludmila A. Chebotkevich, Maxim E. Stebliy
With reduction of the size of nanostructures below 100 nm, the control of their shape becomes more difficult due to the limit of lithography resolution.
The best agreement between experimental and calculated data was observed in the case of exponential approximation , where a, b and c are the fitting coefficients.
Online since: October 2014
Authors: Tao Wang, Yu Ying Wang, Gui Hua Lin
The transmission losses calculation is the foundation of the electricity sector's energy consumption calculation, statistics, analysis and loss reduction.
References [1] XU hanping, HOU Jinfeng, SHI Liuzhong. calculation method of power system line losses based on data of state estimation. power system technology, 2003,23(7):59-62
Online since: February 2015
Authors: Tatyana D. Malinovskaya, Victor Sachkov, Roman A. Nefedov, Ouna B. Sambueva
Fluoride metallurgy, as a complex of technological processes of preparation, cleaning and reduction of fluorides to metals, has been applied primarily in the nuclear industry [3].
From the figure, it is seen that: - at temperature 60 °C ions with mass equal to 19, the hydrogen fluoride are recorded, the lowest intensity of the mass spectrum indicates a slight evolution of hydrogen fluoride from the sample, on the spectrum of X-ray phase analysis the mixture of starting substances is observed; - in the temperature range of 100 °C, the typical mass spectrum of water with insignificant impurities of hydrogen fluoride is observed, the composition according to data of X-ray phase analysis is not changed; - in the temperature range of 135 °C the emission of ammonia is observed that in agreement with the known mechanism of melting of ammonium fluoride with decomposition and the formation of ammonium bifluoride with the evolution of ammonia and the formation of the eutectic mixture NH4F/(NH4F×HF) [5], on the spectrum of X-ray phase analysis the reflexes of ammonium fluoride disappeared that indicates on its melting; - at higher temperature (210 °C) the ammonia continues
Online since: August 2015
Authors: Napat Krachangchaeng, Sakorn Po-Ngam
The UPS is usually used in a communication systems, data processing systems, medical equipment, and computers.
In order to achieve these requirements, the PFC improvement and harmonics reduction were applied in to inverter system.
Online since: December 2014
Authors: Wei Ping Zhao, Song Xiang, Xin Zhao
Mathematical model of quadrotor UAV Yang [4] proposed the transfer function of roll channel for quadrotor UAV as follows: (1) The rotor system involves controller, elctric motor, reduction box, rotor, and speed sensor.
The crossover operation mixes the binary number by swapping a portion of the data structure
Showing 23211 to 23220 of 40397 items